French Conglomerate Hit by Fall in Engineering Group's Share Price

PARIS—French media-to-construction conglomerate Bouygues SA Wednesday said it posted a net loss in 2013 after writing down the value of its 29% stake in Alstom SA by €1.4 billion ($1.92 billion), the engineering group whose shares tanked during the year.

Bouygues posted a net loss of €757 million in 2013, compared with a net profit of €633 million in 2012. Before the write-down, the company posted a net profit of €647 million, below...